<!DOCTYPE html>
<html lang="zh_CN">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

</body>
<script type="text/javascript">

    function sum(a, b) {

        console.log(a + b);

    }


    var a = 12;
    var b = 24;


    sum(a, b);


</script>

</html>
